Liquid crystal cells – elements and systems – Liquid crystal system – Projector including liquid crystal cell
Reexamination Certificate
2007-09-25
2007-09-25
Dudek, James A. (Department: 2871)
Liquid crystal cells, elements and systems
Liquid crystal system
Projector including liquid crystal cell
C349S008000, C349S102000
Reexamination Certificate
active
10303950
ABSTRACT:
A liquid crystal display element which has the high speed response and the high contrast and a display device employing the same are provided. In a display device employing a reflection type liquid crystal light valve, a retardation of a retardation plate which is provided between a polarizing element such as a polarizing beam splitter and the reflection type liquid crystal light valve is generally made ¼ of the wavelength of the incident light, and an optical axis (a slow axis or a fast axis) of the retardation plate and the polarizing direction of the incident polarized light are shifted from each other by slightly larger than 0 degree in order to arrange such optical elements.
REFERENCES:
patent: 5327270 (1994-07-01), Miyatake
patent: 5472635 (1995-12-01), Iida et al.
patent: 5490003 (1996-02-01), Van Sprang
patent: 5576854 (1996-11-01), Schmidt et al.
patent: 5737048 (1998-04-01), Abileah et al.
patent: 5973760 (1999-10-01), Dehmlow
patent: 6147727 (2000-11-01), Shigeno
patent: 6340999 (2002-01-01), Masuda et al.
patent: 2002/0159007 (2002-10-01), Suzuki et al.
patent: 61-13885 (1986-01-01), None
patent: 64-7021 (1989-01-01), None
patent: 2-250026 (1990-10-01), None
patent: A-3-130719 (1991-06-01), None
patent: 4-319910 (1992-11-01), None
patent: 10-90731 (1998-04-01), None
Appl. Phys. Lett., vol. 20, No. 5, Mar. 1, 1972, pp. 199-201.
“A New Twisted Nematic ECB (TN-ECB) Mode for a Reflective Light Valve” by T. Sonehara, et al., Japan Display '89, pp. 192-195.
Appl. Phys. Lett., vol. 68, No. 11, Mar. 11, 1996, pp. 1455-1457.
“Normally White Reflective Twisted Nematic Mode for Silicon-Chip-Based Light Valves” by Shoichi Hirota, et al., Part of the IS&T/SPIE Conference on Liquid Crystal Materials, Devices, and Applications VII—San Jose, California—Jan. 1999, pp. 86-94.
“A Silicon-Chip-Based Light Valve with Reflective Twisted Nematic Mode for High-Definition Projectors” by Shoichi Hirota, et al., IDW '99, pp. 985-988.
Hongfei Cheng, et al.—“Analysis of the operation mode of reflective liquid crystal display devices with front film compensation,” Liquid Crystals, 2000, vol. 27, No. 6, pp. 763-766.
Aoto Katsuhide
Hirota Shoichi
Takemoto Iwao
Tsumura Makoto
Dickstein & Shapiro LLP
Dudek James A.
Hitachi , Ltd.
LandOfFree
Liquid crystal display device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Liquid crystal display device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid crystal display device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3730153